@book{12774,
	author = {Wallace, L. and Bernath, P. F.},
	title = {An atlas of the sunspot umbral spectrum in the red and infrared from 8900 to 15,050 cm-1 (6642 to 11,230 A)},
	publisher = {National Optical Astronomy Observatories},
	year = {1998},
	address = {Tucson}
}